Do you actually ever stop thinking about them

What's normal? Once a day? A week? Never? They were a part of your life, so what's realistic? Im 2 month post BU. Dont want him back but still enters my thoughts a few times a day. Not cried or been upset since the 1st few weeks. I dint want to date until im 'over' him but is not thinking if him realistic? I still think of my boyfriend I broke up with over 20 years ago sometimes!